Piston-ring compressor.



W. HODGKINSON.

PISTON mm; co'mmssoa.

APPLICATION FILED MAY 25' I918.

1,277,213. Patented Aug. 27, 1918.

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Specification of Letters Patent.

' Patented ew, 1918.

Application filed. May 25, 1918. Serial No. 236,562.

To all whom it may concern:

Be it known that I, WILLIAM. HODGKINSON, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented a new and -useful Improvement in Piston-Ring Compressors; and I do hereby declare the. following, when taken in connection with pressor constructed in accordance with my invention.

Fig. 2 a side view of the same.

Fig. 3 a top or plan view.

Fig. 4 a sectional view on the line 4-4: of Fig. 3.

Fig. 5 a face view of the bridge, detached.

Fig. 6 a face view of a modified form of bridge. I

Fig. 7 a broken View of the outer end of the band provided with notches in its outer edges. This invention relates to an improvement in piston-ring compressors, that is, a device for compressing piston rings in grooves formed for them in the piston to facilitate the introduction of the piston into its cylinder, the object of the invention being a simple arrangement of parts whereby the rings may be conveniently compressed and held in a compressed position, while the piston is introduced into its cylinder; and the invention consists in the constructionhereinafter described and particularly recited in the claims.

In the more general construction of pistons for explosive engines, the piston is formed with two or three annular grooves adapted to receive spring rings which normally project beyond the face of the piston but held flush therewith by contact with the cylinder walls.

In carrying out my invention I employ a band 8 of metal of suitable length and of a width to compress two or more rings at the same time. Fixed to the outer face near one end of the band is a bridge 9 also formed from sheet metal, having ends 10 and 11 which are turned inward and riveted or otherwise secured to the band 8 near one end thereof. Preferably and as herein shown, the side walls 12 and 13 of the bridge extend rearward. and are inclined inward toward the upper edge of the bridge so as to present a beveled surface which will permit the band be ng inserted slightly into'the mouth of the cylinder which is usually beveled. As shownin Fig. 5 of the drawings, the lower edge of the bridge is provided with downwardly projecting lugs 14 and 15 which are adapted to enter slots 16 formed for them in the band 8, these slots being spaced so that the device is adapted for compressing rings of different sizes within certain limits.

The band is placed around the rings inserted into the grooves in the piston and the outer end 17 of the band is placed beneath the bridge and the band contracted so as to compress the rings until they stand flush with the outer face of the piston which may then be inserted into its cylinder, and as the piston is forced into the cylinder it will pass through the band, which, in other words, is stripped,

off from the piston by the engagement of the bridge 9 and band 8 with the end of the cylinder. It will be understood that for extra large pistons a longer band may be used. Instead of forming the lugs 14 and 15within the outer edges of the bridge, they may be formed at the sides thereof, as shown in Fig. 6 of the drawings, in which case the band will be formed in its outer edges with notches 18 with which the lugs 19 may engage, the function and operation being the same as the function and operation of the lugs and slots previously described.

This device being in practically one piece and the band in an unbroken strip, is conveniently operated, and when the rings are compressed will remain firmly in a locked position. i

I claim 1. A piston ring compressor comprising a band, a bridge rigidly secured to one end thereof and extending across the outer face of the band and forming a passage between the band and the lower edge of the bridge,

. the other end of the band extending through walls rigidly secured to one end thereof and extending across the outer face of the band and forming a passage between the band and edge of the bridge, the other end of the band extending through said passage and adjustably interlocked with said bridge.

3. A piston ring compressor comprising a projecting lugs, the other end of the band band, a bridge-rigidly; secured to the; band 1; extending thronghlsaid passage and formed 15 near one end and extending across the band With a series of slots which said lugs may and forming a passage betweenathelnpthe enter, whereby the said other end of the 5 lower edge of the bridge formed with down band is interlocked with the bridge.

. wa'rdly projectingsluggyemd theother end of I -=In -testi1nony whereof, I haveisigned this the band extending through said passage specification in the presence 01": two's'ubscrih 20 and engaged With said lugs. ing Witnesses.

4L. A piston rin compressor comprising a 10 band, 21; bridge rigidlysecured to one 'end WILLIAM HODG-KINSON' thereoi i' and extendingacro'ss .the bzind 'forin- Witnesses: ing afpassfage; betWeeIitheIn,.the loweredge Ennmsmo GIEAR'LE, ofthe saidlbridge formed With'dOWnWar'dly 1:0. L." WEED.

" "babies in: this patent ma 'be .b'btiiilied for fi'vments each, by "addressingthe "Commi's'sionei' wr- *Iatents,

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